/Engine/Plugins/Animation/ControlRig/Source/ControlRig/Public/Sequencer/MovieSceneControlRigParameterTrack.h
Add a section at that start time
[UMovieSceneSection](API\Runtime\MovieScene\UMovieSceneSection) * CreateControlRigSection ( [FFrameNumber](API\Runtime\Core\Misc\FFrameNumber) StartTime, [UControlRig](API\Plugins\ControlRig\UControlRig) * InControlRig, bool bInOwnsControlRig )